Bump yapf from 0.29.0 to 0.43.0 in /sdks/python

Bumps [yapf](https://github.com/google/yapf) from 0.29.0 to 0.43.0.
- [Changelog](https://github.com/google/yapf/blob/main/CHANGELOG.md)
- [Commits](google/yapf@v0.29.0...v0.43.0)

---
updated-dependencies:
- dependency-name: yapf
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

sdks/python/pyproject.toml

@@ -34,7 +34,7 @@ requires = [
     'pyyaml>=3.12,<7.0.0',
     # also update Jinja2 bounds in test-suites/xlang/build.gradle (look for xlangWrapperValidation task)
     "jinja2>=2.7.1,<4.0.0",
-    'yapf==0.29.0'
+    'yapf==0.43.0'
 ]